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Note 4 - Debt and Credit Facilities (Details Textual)
 6 Months Ended 12 Months Ended
Jul. 21, 2023
USD ($)
Mar. 31, 2023
USD ($)
Mar. 14, 2023
USD ($)
Feb. 26, 2021
USD ($)
$ / shares
Jun. 30, 2023
USD ($)
$ / shares
Jun. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
$ / shares
Feb. 26, 2024
USD ($)
Sep. 01, 2023
USD ($)
Aug. 30, 2023
USD ($)
Jul. 01, 2023
USD ($)
May 31, 2023
USD ($)
Proceeds from Issuance of Debt         $ 0 $ 49,000,000            
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares       $ 0.01 $ 0.01   $ 0.01          
Percentage Of Stock Of Material Domestic Subsidiaries Securing Credit Agreement             100.00%          
Percentage Of Stock Of Material First Tier Foreign Subsidiaries Securing Credit Agreement             65.00%          
A B L Credit Agreement [Member]                        
Line of Credit Facility, Maximum Borrowing Capacity       $ 90,000,000                
Amended A B L Credit Agreement [Member]                        
Excess Availability Percentage Of Lender Commitments Threshold Triggering Cash Dominion Control         12.50%              
Lender Commitments Threshold Trigger Excess Availability Amount         $ 11,250,000              
Excess Availability Below Which Fixed Charge Coverage Ratios Triggered         12.50%              
Fixed Charged Coverage Ratio Required         1.0              
Letters of Credit Outstanding, Amount         $ 58,000,000   $ 58,000,000          
L C Facility Agreement [Member]                        
Line of Credit Facility, Daily Minimum Liquidity     $ 50,000,000                  
Debt Instrument, Basis Spread on Variable Rate         2.75%              
Line of Credit Facility, Commitment Fee Percentage         0.25%              
Line of Credit Facility, Aggregate Cash Collateral Percentage         104.00%              
Letters of Credit Outstanding, Amount         $ 41,000,000   43,000,000          
Letter Of Credit Cash Collateral         43,000,000   44,000,000          
Letter of Credit, Commitment Amount         $ 50,000,000              
Line of Credit Facility, Percentage of Letter of Credit Fee         3.75%              
L C Facility Agreement [Member] | Subsequent Event [Member]                        
Letter Of Credit Cash Collateral $ 59,000,000                      
Amended A B L Credit Agreement [Member]                        
Line of Credit Facility, Daily Minimum Liquidity     50,000,000                  
Line of Credit Facility, Quarterly Minimum Liquidity     $ 80,000,000                  
Minimum Liquidity Current Balance   $ 143,000,000         $ 150,000,000          
Excess Availability Percentage Of Lender Commitments Threshold Triggering Cash Dominion Control         12.50%   12.50%          
Lender Commitments Threshold Trigger Excess Availability Amount         $ 11,250,000   $ 11,250,000          
Line of Credit Facility, Remaining Borrowing Capacity             $ 21,000,000         $ 17,000,000
Excess Availability Below Which Fixed Charge Coverage Ratios Triggered         12.50%              
Letters of Credit Outstanding, Amount         $ 58,000,000              
Letter of Credit [Member] | A B L Credit Agreement [Member]                        
Line of Credit Facility, Commitment Fee Percentage             0.25%          
A B L Credit Agreement [Member]                        
Lender Commitments Threshold Trigger Excess Availability Amount             $ 11,250,000          
Excess Availability Below Which Fixed Charge Coverage Ratios Triggered             12.50%          
Proforma Fixed Charge Coverage Ratio         1              
Consolidated EBITDA Exceeding Fixed Charges, Amount   $ 9,000,000                    
Letter Of Credit Facility Agreement [Member]                        
Line of Credit Facility, Aggregate Cash Collateral Percentage       103.00%                
Minimum Liquidity Requirement         $ 80,000,000              
Two Thousand Twenty One Notes Embedded Derivative [Member]                        
Embedded Derivative, Fair Value of Embedded Derivative Liability       $ 12,000,000 4,000,000   $ 2,000,000          
Two Thousand Twenty One Convertible Debt [Member]                        
Debt Instrument, Face Amount       $ 25,000,000                
Debt Instrument, Interest Rate, Stated Percentage       5.00%                
Debt Instrument, Convertible, Conversion Ratio       100                
Debt Conversion, Original Debt, Amount       $ 1,000                
Initial Conversion Price Per Share of Common Stock (in dollars per share) | $ / shares       $ 10.00                
Debt Instrument, Convertible, Stock Price Trigger (in dollars per share) | $ / shares       $ 14.50                
Debt Instrument, Convertible, Threshold Consecutive Trading Days       60                
Holder Fundamental Transaction Election Period (Day)       30 days                
Convertible Notes Payable, Noncurrent         19,000,000   18,000,000          
Debt Instrument, Unamortized Discount         8,000,000   9,000,000          
Convertible Debt, Fair Value Disclosures         $ 20,000,000   $ 16,000,000          
Forecast [Member] | L C Facility Agreement [Member]                        
Letter of Credit, Commitment Amount                 $ 50,000,000 $ 100,000,000    
Forecast [Member] | Amended A B L Credit Agreement [Member]                        
Line of Credit Facility, Maximum Borrowing Capacity               $ 81,000,000        
Forecast [Member] | Two Thousand Twenty One Convertible Debt [Member]                        
Repayments of Debt 25,000,000                      
Minimum [Member] | Amended A B L Credit Agreement [Member]                        
Fixed Charged Coverage Ratio Required         1.0   1.0          
Minimum [Member] | Revolving Credit Facility [Member] | Amended A B L Credit Agreement [Member]                        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.375%                  
Minimum [Member] | Revolving Credit Facility [Member] | Amended A B L Credit Agreement [Member] | Secured Overnight Financing Rate (SOFR) [Member]                        
Debt Instrument, Basis Spread on Variable Rate     3.50%                  
Minimum [Member] | Revolving Credit Facility [Member] | L C Facility Agreement [Member]                        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage         0.375%              
Minimum [Member] | Two Thousand Twenty One Convertible Debt [Member]                        
Debt Instrument, Convertible, Threshold Trading Days       45                
Maximum [Member] | Revolving Credit Facility [Member] | L C Facility Agreement [Member]                        
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage         0.50%              
Term Loan Credit Agreement [Member]                        
Long-Term Debt, Total       $ 225,000,000                
Long Term Debt, Maximum Additional Proceeds       $ 50,000,000                
Refinancing Term Loans [Member]                        
Debt Instrument, Face Amount         $ 450,000,000              
Debt Instrument, Interest Rate, Annum Payable         7.50%              
Debt Instrument, Interest Rate, Payable In-kind         5.00%              
Debt Instrument, Interest Rate, Stated Percentage         12.50%              
Refinancing Term Loans [Member] | UNITED STATES                        
Maximum Amount Liquidity Required         $ 60,000,000              
Refinancing Term Loans [Member] | UNITED STATES | Forecast [Member]                        
Maximum Amount Liquidity Required                     $ 85,000,000  
Refinancing Term Loans [Member] | Minimum [Member]                        
Debt Instrument, Material Indebtness         20,000,000              
Refinancing Term Loans [Member] | Maximum [Member]                        
Debt Instrument, Material Indebtness         $ 25,000,000              
Refinancing Term Loans [Member] | Used to Refinance Obligations [Member]                        
Proceeds from Issuance of Debt 435,000,000                      
Refinancing Term Loans [Member] | General Corporate Purposes and Working Capital Needs [Member]                        
Proceeds from Issuance of Debt $ 29,000,000